[BreachExchange] Millions of Devices Affected by Vulnerability in HP, Samsung, Xerox Printer Drivers

[Sophia Kingsbury]

https://www.securityweek.com/millions-devices-affected-vulnerability-hp-samsung-xerox-printer-drivers

A printer driver shipped to millions of computers since 2005 is affected by
a vulnerability that can be exploited for privilege escalation, according
to endpoint security company SentinelOne.

The vulnerability was initially discovered earlier this year in a driver
shipped with HP printers, but a closer analysis revealed that the impacted
component has also been delivered with Samsung and Xerox devices. The
problematic driver was developed based on open source driver samples made
available by Microsoft, but the vulnerability does not appear to exist in
the original sample.

HP has listed more than 380 HP and Samsung printer models affected by the
flaw — HP acquired Samsung’s printer business in 2017. Xerox has identified
a dozen printer models affected by the vulnerability.

HP and Xerox have released patches for the vulnerability, and consumers and
enterprises have been advised to install them.

The security hole is tracked as CVE-2021-3438 and it has been assigned a
high severity rating (CVSS score of 8.8).

According to SentinelOne, the vulnerability allows an attacker who has low
privileges on the targeted computer to escalate permissions to SYSTEM and
execute code, which the company says can be useful for bypassing security
products, as well as other purposes.

“Successfully exploiting a driver vulnerability might allow attackers to
potentially install programs, view, change, encrypt or delete data, or
create new accounts with full user rights,” SentinelOne said. “Weaponizing
this vulnerability might require chaining other bugs as we didn’t find a
way to weaponize it by itself given the time invested.”

The company said it had not seen any evidence to suggest that the
vulnerability has been exploited in the wild, but noted that “with millions
of printer models currently vulnerable, it is inevitable that if attackers
weaponize this vulnerability they will seek out those that have not taken
the appropriate action.”
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